St. Thomas Aquinas Secondary School may refer to:
In Canada: St. Thomas Aquinas Secondary School (Brampton), Ontario St. Thomas Aquinas Catholic Secondary School (Lindsay), Ontario St. Thomas Aquinas Catholic Secondary School (London, Ontario) St. Thomas Aquinas Catholic Secondary School (Oakville), Ontario St. Thomas Aquinas Catholic Secondary School (Tottenham), Ontario
In England: St. Thomas Aquinas Catholic School, Birmingham
In Ghana: St. Thomas Aquinas Senior High School
In Scotland: St. Thomas Aquinas Secondary School, Glasgow
See also St. Thomas Aquinas High School (disambiguation)